Fuse device.



v L. 0. MEVLLOR.

FUSE DEVICE. APPLICATION FH .ED MAR- 3. I913.

Patented Feb. 291916.

I ive/1Z5?" W njqea LESTER O. MELLOR, F EVANS'ION, ILLINOIS.

FUSE DEVICE.

incense.

Specification of Letters Patent.

Patented. Feb. 29, 1916.

Application filed March 3, 1913'. Serial no. 751,686.

To all whom itmay concern:

' Be it known that I, Lns'rnn O. MELLOR, a

citizen of the United States, residing at Evanston, in the county ofCook and State of Illinois, have invented a certain new and usefulImprovement in Fuse Devices, of which the following is a full, clear,concise and exact description, reference being had to the accompanyingdrawings, forming a part oi this specification.

My invention relates to fuse devices, and especially to fuse devices inwhich the fuses are inclosed.

Prominent objects of the invention are to provide a simple, practicaland inexpensive form of fuse device; to arrange for the extinguishmentof the are formed when the fuse blows; to prevent iiijiiry'to thedevice.

and surrounding objects by the operation of the fuse; and to accomplishthe foregoing and other desirable results in a simple and expeditiousmanner.

In the accompanying drawings Figure l is a vertical section of a fusedevice embodying my present invention; Figs. 2 and 3 are horizontalsections of the same, taken on the lines 2--2 and 3-3 in Fig. 1; Figs.4' and 5 are views of details ofconstructi onu Referring to thedrawings, 1 provide an exterior case, 1 which is made of any desirablematerial, preferably porcelain or other insulating material. This caseis in the form of an ihverted socket with vertical cylindric walls andis shown in Figs. 2 and 3 open at its lower end. Said lower end isenlarged as shown in Figs. 1 and 2,. and will be referred to moreparticularly hereafter. l/Vithin the socket 1 is a plug 2 alsocylindrical in form and adapted to fit within the cylii'idric bore 3 oithe socket 1 so as to permit ready insertion and removal of the plug 2into said socket 1. The plug2 is provided at its lower end with a handle4 by which i said plug may be grasped by the hand, and

said handle is extended from a cross portion 5 of relatively large sizeso that it closes the lower end of the enlarged bore 6 of the socket 1.The plug 2 is provided with metal.

clips 7--7 which. have lateral projections 8--8 and the socket 1 isprovided with spring socket members or jaws, 99 adapted to receive thelateral projections 88, said members 99 being preferably in the form ofsheet metal pieces l0-10, bent to form the laterallyprojecting"horizontal spring socket jaws 9-9, as shown in Fig. 4. Theclips 7-7 are secured to the plug 2 by screws 1l--11, and the springsocket members 99 are secured to the socket 1 by screws 12-42, saidspring socket members being arranged in the enlarged bore 6. of thesocket member: 1. Thusthe be held in position in the socket land contactalso made between the two members by the engagement of the clipprojections plug 2 may 8-8 with the socket members or jaws 9 9.

This engagement and disengagement canbe brought about by giving the plug2 a small I turn or twist by means of the handle 4 so as to slipthe-projections 8+8 into or out of the sockets 9 9, The plug 2 carries afuse 14 which is arranged. in irregular form. as best shown in Fig. 1Said fuse is secured at its ends to the clips 77, as shown in Fig. 1 and5, and extends thence upwardly and across the top of the plug 2 andthence downwardly withinthe bore 15 thereof; and across the same asshown in Fig. 1. The lower cross portion of the fuse in said bore 15 isreduced or narrowed as shown. at 16, Fig. 3.. The bore or chamber 15 isdesirably provided with oil or otherarc extinguishing liquid 17, whichof "course has the -efleot of submerging orpartly submerging the fuse14. A loose block is fittedupon the top of the, plug 2, saidblock 18conveniently having a down.- ward projection 19 which fits into bore 15and extends part way down the same with space between said portion 19and the walls 'of'the bore 15 sufficient to allow the fuse 14. tghaveits proper position; A. spring 20 is interposed between the block 18and, the

top of the socket 1, said spring 20 serving a normally to ho'd the block18 down and Thus it will be seen that when the device I tions and alsobetween the do endin ortions so that a very irregular path tending toobstruct the arc is provided. It will be further seenthat the narrowedor reduced portion of the fuse which of course is that portion whichwill first blow, is well Within the device, being farthest fromtheterminals and best projected by the barriers and also is immersed in oilor other suitable liquid. It will also be seen that this reduced or mostsusceptible part of the fuse is practically inclosed, the'block 18forming a; substantial closure" for the bore 15 of the plug 2 wherebythe arc is well confined and also that sulficient yield to accommodateany explosion of the fuse is provided by the movability of one of thewalls, as for example the block 1 18 of the confining chamber therebypre-- venting damage from the explosion of the fuse. It will also beseen that this movable or yieldable portion of the confining Wall isautomatically restoredto place and held with a' proper amount of'tensionagainst movement so that the fuse and liquid therefor are not undulydissipated, but are sufiiciently confined to prevent scattering andother undesirable effects. It will further be seen that when the fusehas operated it can be replaced by-simply detaching and removing theplug '2 and putting a new fuse and" new liquid if necessary in the same.

It will be understood that changes and modifications can be made:without depart in from the spirit of the invention.

Vhat I claim is: n

1'. A fuse device comprising plug and socket members, the socket .memberbeing. open at its lower endand the plug being insertible intothejsocket member from below, said plug being provided with'a cen-'trally arranged chamber and carrying-a fuse which is connected to theouter Walls ofthe plug and extends thence upwardly and then inwardly anddownwardly in said chamber, arc extinguishing liquid in said chambersubmerging a portion of said fuse, a closure 18 mounted upon' the upperendof the plug and closing the chamberv thereof, and spring meansinterposed 'between said closure and the top of'the socket memben.

'2. A fuse device comprising plug. and socket member's, whereof thesocket member is-provided with an opening whosev mouth is atits lowerend and the plug member being arranged to be inserted upwardly into saidopening, said plug memher being provided with .a chamber-open at itstop, a fuse having its terminals secured to the sides of said plugmember and extended downwardly into said chamber, and

. arc extinguishing liquid in said chamber submerging the lower portionof said fuse therein. 4

3. fuse device comprising plug and socket members, whereof thesocketinember' is provided with an opening whose mouth is at its lower end andthe-plug member being arranged to be inserted upwardly into saidopening, said pluganembe'r being provided wit-ha chamber open at, its'top,

the lower portion "of said fuse therein, and 7 a closure for the upperend of said chamher in said plug.

a. A fuse device comprising plug and socket members, whereof the socketmember 7 is provided with an opening whose mouth is at its lower end andthe plugmember being arranged to be inserted upwardly into said opening,said plug member being providedwith a chamber open at, its top, a fusehaving its terminals secured to the sides of sa1d plug memberandextended downwardlyintosaid chamber, arc extinguishing liquid in saidchamber submerging the, lower portion of said fuse therein, and aclosure for the upper end of said chamber in said plug, said closurehaving a projection extending down into said chamber and interposedbetween downwardly extending portions of said use. above said liquid. l

5.. A fuse device having anin ternally arranged chamber containing arcextinguishing liquid, afuse led into the top of saidthe opposite sidesthereof and across the same below the top thereof, and-a removableclosure for said chamber resting upon the. top of the walls of saidchamber, and having a projection extending downwardly into said chamber.

6. A fuse device having an internally arranged chamber containing arcextinguish- 'ing liquid, a fuse led into; the top of said chamber andextended downwardly 'along the opposite sides'ther'eof, andgacross thesame below the top thereof, removable closure for said chamber restingupon the top of the walls of said chamber, and 7 wardly extendingportion of the fuse, and

chamber and extended downwardly along 10g into said chamber and betweenthe down- 1-25 sprmg means acting upon the t'op 'of said closilr'e and.tending to held. the same down being formed by a dbwnwerrlly extendingprojection on seicx closure, and a, spring aetmg upon sald closure tohold the same normally 1n posltlo'n in close smd chamber;

In Witness whereof, I hereunto subscribe 15 my name this 26th day ofFebruary, A. 1). L913.

LESTER O. MELLOR.

Witnesses: A. L.- JONES,

H. A. JONES.

